“The investigations are winding down. I have no idea what makes you think these cases will take decades. Neither the perps nor current LE will be alive in decades. That’s a rather ridiculous assertion.”
Hmm, for example... Comey, Yates, McCabe, both Obamas, Lynch, Holder, Strzok, Page, will all be in their 80s in 20 years. And who knows, with medical advances (such as the ones currently keeping RBG alive) maybe more principal figures. Just b/c someone dies in LE it doesn’t mean the cases they are working on die with them. So no, not ridiculous.
“They will be dead” is not my main point.
Your other points are ridiculous even without the above.